Travel to Ireland for holidays

[Peace2804]

Hi all,

A friend of mine wants to pay me a visit, she's a non EU citizen but she's the holder of the French "Carte de Sejour" as she is married to a French Citizen, she's planing to travel with her son who's the holder of a French passport, unfortunately the father can't join them as he's currently very busy.

I am aware that Ireland isn't part of the Shengen zone, for this reason I have 3 questions:
1 - Can this person travel to Ireland for holidays with her "Carte de sejour" or does she need a visa?
2 - if it's the later would her application be different if she applies from French as opposed to her home country which is outside the EU zone??
3 - if indeed she needs a visa, can you please provide me with a link that explains all the documents needed/steps to follow??

Your help is highly appreciated!!
Thanks in advance!

[Peace2804]

Any help regarding the above query would be highly appreciated!! Cheers.